Only available in certain geographies and can therefore be difficult to purchase

I have been a big fan of the EOS M system since its release and this lens was the icing on the cake. It now stays almost permanently on my EOS M.

I find the focal length range very useful and the colours, contrast and sharpness are excellent. The IS works effectively without you even noticing it is working and the whole package is light, compact and very portable. Since starting to use the EOS M system I use my SLR kit very little.

In its storage position the 11-22mm lens is physically locked and needs to be unlocked and rotated into the operating position before it can be used. This is a bit fiddly at first, but you soon get used to it.

That's one little issue, but a bigger issue was purchasing the lens in the first place. Despite buying my EOS M and other EF-M lenses in Thailand, Canon decided that they wouldn't sell the EF-M 11-22 in Thailand and therefore I had to drive to Malaysia to get one. Very convenient.

I still love my EOS M and I love this particular lens. As another reviewer said, there are some doubts about how serious Canon are with EOS M, but with the announcement of the EOS M Mark 3 hopefully they are serious. It's a great system and it has a lot of potential.

I have posted some more information and thoughts (along with sample images) on my website:

Has a lock function, you have to release it every time you want to use it, maybe a bit expensive. Plus we don't really know if Canon will go on making cameras with the EF-M mount. Maybe a bit slow

A very good small wide zoom. The future of the EF-M mount is uncertain and the M isn't the best of it's type available but if you want to use the Canon flash system etc this is your only choice right now.

Edit: I have now been using this lens professionally in conjunction with my full frame gear for a few months. It's absolutely fantastic and worth twice the price if not more.

Sharp, great contrast, good IS in a tiny little lens. It's worth buying the M just for this lens

I have made a few tests with my lens and the results are impressive - there are not much visible problems even wide open, this might be the best UWA lens for overall image quality and price. There are no visible flaws like chromatic aberrations, unacceptable distortion, bad flares.